I have Installed in Oracle Mobile Server in windows XP,
and installed mobile client and synchronize it using msync.exe file and I got sync success message, up to that its working well.
then we import oracle mobile sync sample application into eclipse android sdk.

when I going to run that application in emulator and its asking for username and password and Server URL.
we got error like "Encounter error : Internal error has occurred(see the cause)" after hitting "Sync" button.

As per your first post "and installed mobile client"....................I am stuck with this step. I have installed the Oracle Database mobile server sucessfully,able to access the mobile server console. However I cannot really make out what should I do to install the mobile client.....Please can you provide any hints......